mirror of
https://github.com/QingdaoU/OnlineJudge.git
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113 lines
3.0 KiB
Python
113 lines
3.0 KiB
Python
# coding=utf-8
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import os
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import hashlib
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import time
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import random
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import logging
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from django.shortcuts import render
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from django.core.paginator import Paginator
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from rest_framework.response import Response
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logger = logging.getLogger("app_info")
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def error_page(request, error_reason):
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return render(request, "utils/error.html", {"error": error_reason})
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def error_response(error_reason):
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return Response(data={"code": 1, "data": error_reason})
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def serializer_invalid_response(serializer):
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for k, v in serializer.errors.iteritems():
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return error_response(k + " : " + v[0])
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def success_response(data):
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return Response(data={"code": 0, "data": data})
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def paginate_data(request, query_set, object_serializer):
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"""
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用于分页的函数
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如果 url 里面不含有paging=true，那么将返回全部数据。类似
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[
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{
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"username": "1111111",
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"password": "123456"
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}
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]
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如果 url 中有 paging=true 的参数，
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然后还需要读取其余的两个参数，page=[int]，需要的页码，p
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age_size=[int]，一页的数据条数
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:param query_set 数据库查询结果
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:param object_serializer: 序列化单个object的serializer
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"""
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need_paginate = request.GET.get("paging", None)
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# 如果请求的参数里面没有paging=true的话 就返回全部数据
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if need_paginate != "true":
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if object_serializer:
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return object_serializer(query_set, many=True).data
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else:
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return query_set
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page_size = request.GET.get("page_size", None)
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if not page_size:
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raise ValueError("Error parameter page_size")
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try:
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page_size = int(page_size)
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except Exception:
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raise ValueError("Error parameter page_size")
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paginator = Paginator(query_set, page_size)
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page = request.GET.get("page", None)
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try:
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current_page = paginator.page(page)
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except Exception:
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raise ValueError("Error parameter current_page")
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if object_serializer:
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results = object_serializer(current_page, many=True).data
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else:
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results = current_page
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data = {"results": results,
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"previous_page": None,
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"next_page": None,
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"page_size": page_size,
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"current_page": page,
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"count": paginator.count,
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"total_page": paginator.num_pages}
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try:
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data["previous_page"] = current_page.previous_page_number()
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except Exception:
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pass
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try:
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data["next_page"] = current_page.next_page_number()
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except Exception:
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pass
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return data
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def paginate(request, query_set, object_serializer=None):
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try:
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data= paginate_data(request, query_set, object_serializer)
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except Exception as e:
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logger.error(str(e))
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return error_response(u"参数错误")
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return success_response(data)
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def rand_str(length=32):
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if length > 128:
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raise ValueError("length must <= 128")
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return hashlib.sha512(os.urandom(128)).hexdigest()[0:length] |